JAVASCRIPT

iterate key value object javascript

'use strict';
// ECMAScript 2017
const object = {'a': 1, 'b': 2, 'c' : 3};
for (const [key, value] of Object.entries(object)) {
  console.log(key, value);
}

javascript iterate object key values

Object.entries(obj).forEach(([key, value]) => {
	console.log(key, value);
});

iterate object keys javascript

Object.keys(obj).forEach(function(key) {
    console.log(key, obj[key]);
});

how to iterate over keys in object javascript

var p = {
    "p1": "value1",
    "p2": null,
    "p3": "value3"
};

for (var key in p) {
    if (p.hasOwnProperty(key)) {
        console.log(key + " -> " + p[key]);
    }
}

Iterate Through the Keys of an Object

// Iterate Through the Keys of an Object

const usersObj = {
  Alan: {
    online: false,
  },
  Jeff: {
    online: true,
  },
  Sarah: {
    online: false,
  },
};

function countOnline(usersObj) {
  let count = 0;
  for (let user in usersObj) {
    if (usersObj[user].online === true) count++;
  }
  return count;
}

console.log(countOnline(usersObj));

for ...in statement to iterate object keys

for (let user in obj) {
  if (obj[user].online === true) {
    //code
  }
}

Iterate Through the Keys of an Object with a for...in Statement

let users = {
  Alan: {
    age: 27,
    online: true
  },
  Jeff: {
    age: 32,
    online: true
  },
  Sarah: {
    age: 48,
    online: true
  },
  Ryan: {
    age: 19,
    online: true
  }
};

function isEveryoneHere(userObj) {
  return ["Alan", "Jeff", "Sarah", "Ryan"].every(name =>
    userObj.hasOwnProperty(name)
  );
}